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591 lines
23 KiB
Python
591 lines
23 KiB
Python
"""
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Comprehensive unit tests for VariableTruncator class based on current implementation.
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This test suite covers all functionality of the current VariableTruncator including:
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- JSON size calculation for different data types
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- String, array, and object truncation logic
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- Segment-based truncation interface
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- Helper methods for budget-based truncation
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- Edge cases and error handling
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"""
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import functools
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import json
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import uuid
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from typing import Any
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from uuid import uuid4
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import pytest
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from core.file.enums import FileTransferMethod, FileType
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from core.file.models import File
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from core.variables.segments import (
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ArrayFileSegment,
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ArraySegment,
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FileSegment,
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FloatSegment,
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IntegerSegment,
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NoneSegment,
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ObjectSegment,
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StringSegment,
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)
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from services.variable_truncator import (
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MaxDepthExceededError,
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TruncationResult,
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UnknownTypeError,
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VariableTruncator,
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)
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@pytest.fixture
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def file() -> File:
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return File(
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id=str(uuid4()), # Generate new UUID for File.id
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tenant_id=str(uuid.uuid4()),
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type=FileType.DOCUMENT,
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transfer_method=FileTransferMethod.LOCAL_FILE,
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related_id=str(uuid.uuid4()),
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filename="test_file.txt",
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extension=".txt",
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mime_type="text/plain",
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size=1024,
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storage_key="initial_key",
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)
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_compact_json_dumps = functools.partial(json.dumps, separators=(",", ":"))
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class TestCalculateJsonSize:
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"""Test calculate_json_size method with different data types."""
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@pytest.fixture
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def truncator(self):
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return VariableTruncator()
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def test_string_size_calculation(self):
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"""Test JSON size calculation for strings."""
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# Simple ASCII string
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assert VariableTruncator.calculate_json_size("hello") == 7 # "hello" + 2 quotes
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# Empty string
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assert VariableTruncator.calculate_json_size("") == 2 # Just quotes
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# Unicode string
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assert VariableTruncator.calculate_json_size("你好") == 4
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def test_number_size_calculation(self, truncator):
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"""Test JSON size calculation for numbers."""
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assert truncator.calculate_json_size(123) == 3
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assert truncator.calculate_json_size(12.34) == 5
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assert truncator.calculate_json_size(-456) == 4
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assert truncator.calculate_json_size(0) == 1
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def test_boolean_size_calculation(self, truncator):
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"""Test JSON size calculation for booleans."""
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assert truncator.calculate_json_size(True) == 4 # "true"
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assert truncator.calculate_json_size(False) == 5 # "false"
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def test_null_size_calculation(self, truncator):
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"""Test JSON size calculation for None/null."""
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assert truncator.calculate_json_size(None) == 4 # "null"
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def test_array_size_calculation(self, truncator):
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"""Test JSON size calculation for arrays."""
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# Empty array
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assert truncator.calculate_json_size([]) == 2 # "[]"
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# Simple array
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simple_array = [1, 2, 3]
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# [1,2,3] = 1 + 1 + 1 + 1 + 1 + 2 = 7 (numbers + commas + brackets)
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assert truncator.calculate_json_size(simple_array) == 7
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# Array with strings
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string_array = ["a", "b"]
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# ["a","b"] = 3 + 3 + 1 + 2 = 9 (quoted strings + comma + brackets)
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assert truncator.calculate_json_size(string_array) == 9
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def test_object_size_calculation(self, truncator):
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"""Test JSON size calculation for objects."""
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# Empty object
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assert truncator.calculate_json_size({}) == 2 # "{}"
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# Simple object
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simple_obj = {"a": 1}
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# {"a":1} = 3 + 1 + 1 + 2 = 7 (key + colon + value + brackets)
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assert truncator.calculate_json_size(simple_obj) == 7
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# Multiple keys
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multi_obj = {"a": 1, "b": 2}
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# {"a":1,"b":2} = 3 + 1 + 1 + 1 + 3 + 1 + 1 + 2 = 13
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assert truncator.calculate_json_size(multi_obj) == 13
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def test_nested_structure_size_calculation(self, truncator):
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"""Test JSON size calculation for nested structures."""
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nested = {"items": [1, 2, {"nested": "value"}]}
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size = truncator.calculate_json_size(nested)
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assert size > 0 # Should calculate without error
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# Verify it matches actual JSON length roughly
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actual_json = _compact_json_dumps(nested)
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# Should be close but not exact due to UTF-8 encoding considerations
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assert abs(size - len(actual_json.encode())) <= 5
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def test_calculate_json_size_max_depth_exceeded(self, truncator):
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"""Test that calculate_json_size handles deep nesting gracefully."""
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# Create deeply nested structure
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nested: dict[str, Any] = {"level": 0}
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current = nested
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for i in range(105): # Create deep nesting
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current["next"] = {"level": i + 1}
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current = current["next"]
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# Should either raise an error or handle gracefully
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with pytest.raises(MaxDepthExceededError):
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truncator.calculate_json_size(nested)
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def test_calculate_json_size_unknown_type(self, truncator):
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"""Test that calculate_json_size raises error for unknown types."""
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class CustomType:
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pass
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with pytest.raises(UnknownTypeError):
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truncator.calculate_json_size(CustomType())
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class TestStringTruncation:
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LENGTH_LIMIT = 10
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"""Test string truncation functionality."""
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@pytest.fixture
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def small_truncator(self):
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return VariableTruncator(string_length_limit=10)
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def test_short_string_no_truncation(self, small_truncator):
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"""Test that short strings are not truncated."""
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short_str = "hello"
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result = small_truncator._truncate_string(short_str, self.LENGTH_LIMIT)
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assert result.value == short_str
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assert result.truncated is False
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assert result.value_size == VariableTruncator.calculate_json_size(short_str)
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def test_long_string_truncation(self, small_truncator: VariableTruncator):
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"""Test that long strings are truncated with ellipsis."""
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long_str = "this is a very long string that exceeds the limit"
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result = small_truncator._truncate_string(long_str, self.LENGTH_LIMIT)
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assert result.truncated is True
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assert result.value == long_str[:5] + "..."
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assert result.value_size == 10 # 10 chars + "..."
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def test_exact_limit_string(self, small_truncator: VariableTruncator):
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"""Test string exactly at limit."""
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exact_str = "1234567890" # Exactly 10 chars
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result = small_truncator._truncate_string(exact_str, self.LENGTH_LIMIT)
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assert result.value == "12345..."
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assert result.truncated is True
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assert result.value_size == 10
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class TestArrayTruncation:
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"""Test array truncation functionality."""
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@pytest.fixture
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def small_truncator(self):
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return VariableTruncator(array_element_limit=3, max_size_bytes=100)
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def test_small_array_no_truncation(self, small_truncator: VariableTruncator):
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"""Test that small arrays are not truncated."""
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small_array = [1, 2]
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result = small_truncator._truncate_array(small_array, 1000)
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assert result.value == small_array
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assert result.truncated is False
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def test_array_element_limit_truncation(self, small_truncator: VariableTruncator):
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"""Test that arrays over element limit are truncated."""
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large_array = [1, 2, 3, 4, 5, 6] # Exceeds limit of 3
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result = small_truncator._truncate_array(large_array, 1000)
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assert result.truncated is True
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assert result.value == [1, 2, 3]
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def test_array_size_budget_truncation(self, small_truncator: VariableTruncator):
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"""Test array truncation due to size budget constraints."""
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# Create array with strings that will exceed size budget
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large_strings = ["very long string " * 5, "another long string " * 5]
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result = small_truncator._truncate_array(large_strings, 50)
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assert result.truncated is True
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# Should have truncated the strings within the array
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for item in result.value:
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assert isinstance(item, str)
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assert VariableTruncator.calculate_json_size(result.value) <= 50
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def test_array_with_nested_objects(self, small_truncator):
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"""Test array truncation with nested objects."""
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nested_array = [
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{"name": "item1", "data": "some data"},
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{"name": "item2", "data": "more data"},
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{"name": "item3", "data": "even more data"},
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]
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result = small_truncator._truncate_array(nested_array, 30)
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assert isinstance(result.value, list)
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assert len(result.value) <= 3
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for item in result.value:
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assert isinstance(item, dict)
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class TestObjectTruncation:
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"""Test object truncation functionality."""
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@pytest.fixture
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def small_truncator(self):
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return VariableTruncator(max_size_bytes=100)
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def test_small_object_no_truncation(self, small_truncator):
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"""Test that small objects are not truncated."""
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small_obj = {"a": 1, "b": 2}
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result = small_truncator._truncate_object(small_obj, 1000)
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assert result.value == small_obj
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assert result.truncated is False
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def test_empty_object_no_truncation(self, small_truncator):
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"""Test that empty objects are not truncated."""
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empty_obj = {}
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result = small_truncator._truncate_object(empty_obj, 100)
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assert result.value == empty_obj
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assert result.truncated is False
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def test_object_value_truncation(self, small_truncator):
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"""Test object truncation where values are truncated to fit budget."""
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obj_with_long_values = {
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"key1": "very long string " * 10,
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"key2": "another long string " * 10,
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"key3": "third long string " * 10,
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}
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result = small_truncator._truncate_object(obj_with_long_values, 80)
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assert result.truncated is True
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assert isinstance(result.value, dict)
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assert set(result.value.keys()).issubset(obj_with_long_values.keys())
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# Values should be truncated if they exist
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for key, value in result.value.items():
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if isinstance(value, str):
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original_value = obj_with_long_values[key]
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# Value should be same or smaller
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assert len(value) <= len(original_value)
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def test_object_key_dropping(self, small_truncator):
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"""Test object truncation where keys are dropped due to size constraints."""
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large_obj = {f"key{i:02d}": f"value{i}" for i in range(20)}
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result = small_truncator._truncate_object(large_obj, 50)
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assert result.truncated is True
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assert len(result.value) < len(large_obj)
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# Should maintain sorted key order
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result_keys = list(result.value.keys())
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assert result_keys == sorted(result_keys)
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def test_object_with_nested_structures(self, small_truncator):
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"""Test object truncation with nested arrays and objects."""
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nested_obj = {"simple": "value", "array": [1, 2, 3, 4, 5], "nested": {"inner": "data", "more": ["a", "b", "c"]}}
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result = small_truncator._truncate_object(nested_obj, 60)
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assert isinstance(result.value, dict)
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class TestSegmentBasedTruncation:
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"""Test the main truncate method that works with Segments."""
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@pytest.fixture
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def truncator(self):
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return VariableTruncator()
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@pytest.fixture
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def small_truncator(self):
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return VariableTruncator(string_length_limit=20, array_element_limit=3, max_size_bytes=200)
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def test_integer_segment_no_truncation(self, truncator):
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"""Test that integer segments are never truncated."""
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segment = IntegerSegment(value=12345)
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result = truncator.truncate(segment)
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assert isinstance(result, TruncationResult)
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assert result.truncated is False
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assert result.result == segment
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def test_boolean_as_integer_segment(self, truncator):
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"""Test boolean values in IntegerSegment are converted to int."""
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segment = IntegerSegment(value=True)
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result = truncator.truncate(segment)
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assert isinstance(result, TruncationResult)
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assert result.truncated is False
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assert isinstance(result.result, IntegerSegment)
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assert result.result.value == 1 # True converted to 1
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def test_float_segment_no_truncation(self, truncator):
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"""Test that float segments are never truncated."""
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segment = FloatSegment(value=123.456)
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result = truncator.truncate(segment)
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assert isinstance(result, TruncationResult)
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assert result.truncated is False
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assert result.result == segment
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def test_none_segment_no_truncation(self, truncator):
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"""Test that None segments are never truncated."""
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segment = NoneSegment()
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result = truncator.truncate(segment)
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assert isinstance(result, TruncationResult)
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assert result.truncated is False
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assert result.result == segment
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def test_file_segment_no_truncation(self, truncator, file):
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"""Test that file segments are never truncated."""
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file_segment = FileSegment(value=file)
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result = truncator.truncate(file_segment)
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assert result.result == file_segment
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assert result.truncated is False
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def test_array_file_segment_no_truncation(self, truncator, file):
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"""Test that array file segments are never truncated."""
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array_file_segment = ArrayFileSegment(value=[file] * 20)
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result = truncator.truncate(array_file_segment)
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assert result.result == array_file_segment
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assert result.truncated is False
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def test_string_segment_small_no_truncation(self, truncator):
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"""Test small string segments are not truncated."""
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segment = StringSegment(value="hello world")
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result = truncator.truncate(segment)
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assert isinstance(result, TruncationResult)
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assert result.truncated is False
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assert result.result == segment
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def test_string_segment_large_truncation(self, small_truncator):
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"""Test large string segments are truncated."""
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long_text = "this is a very long string that will definitely exceed the limit"
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segment = StringSegment(value=long_text)
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result = small_truncator.truncate(segment)
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assert isinstance(result, TruncationResult)
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assert result.truncated is True
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assert isinstance(result.result, StringSegment)
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assert len(result.result.value) < len(long_text)
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assert result.result.value.endswith("...")
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def test_array_segment_small_no_truncation(self, truncator):
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"""Test small array segments are not truncated."""
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from factories.variable_factory import build_segment
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segment = build_segment([1, 2, 3])
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result = truncator.truncate(segment)
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assert isinstance(result, TruncationResult)
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assert result.truncated is False
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assert result.result == segment
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def test_array_segment_large_truncation(self, small_truncator):
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"""Test large array segments are truncated."""
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from factories.variable_factory import build_segment
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large_array = list(range(10)) # Exceeds element limit of 3
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segment = build_segment(large_array)
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result = small_truncator.truncate(segment)
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assert isinstance(result, TruncationResult)
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assert result.truncated is True
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assert isinstance(result.result, ArraySegment)
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assert len(result.result.value) <= 3
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def test_object_segment_small_no_truncation(self, truncator):
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"""Test small object segments are not truncated."""
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segment = ObjectSegment(value={"key": "value"})
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result = truncator.truncate(segment)
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assert isinstance(result, TruncationResult)
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assert result.truncated is False
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assert result.result == segment
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def test_object_segment_large_truncation(self, small_truncator):
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"""Test large object segments are truncated."""
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large_obj = {f"key{i}": f"very long value {i}" * 5 for i in range(5)}
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segment = ObjectSegment(value=large_obj)
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result = small_truncator.truncate(segment)
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assert isinstance(result, TruncationResult)
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assert result.truncated is True
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assert isinstance(result.result, ObjectSegment)
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# Object should be smaller or equal than original
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original_size = small_truncator.calculate_json_size(large_obj)
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result_size = small_truncator.calculate_json_size(result.result.value)
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assert result_size <= original_size
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def test_final_size_fallback_to_json_string(self, small_truncator):
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"""Test final fallback when truncated result still exceeds size limit."""
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# Create data that will still be large after initial truncation
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large_nested_data = {"data": ["very long string " * 5] * 5, "more": {"nested": "content " * 20}}
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segment = ObjectSegment(value=large_nested_data)
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# Use very small limit to force JSON string fallback
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tiny_truncator = VariableTruncator(max_size_bytes=50)
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result = tiny_truncator.truncate(segment)
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assert isinstance(result, TruncationResult)
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assert result.truncated is True
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assert isinstance(result.result, StringSegment)
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# Should be JSON string with possible truncation
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assert len(result.result.value) <= 53 # 50 + "..." = 53
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def test_final_size_fallback_string_truncation(self, small_truncator):
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"""Test final fallback for string that still exceeds limit."""
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# Create very long string that exceeds string length limit
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very_long_string = "x" * 6000 # Exceeds default string_length_limit of 5000
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segment = StringSegment(value=very_long_string)
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# Use small limit to test string fallback path
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tiny_truncator = VariableTruncator(string_length_limit=100, max_size_bytes=50)
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result = tiny_truncator.truncate(segment)
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assert isinstance(result, TruncationResult)
|
|
assert result.truncated is True
|
|
assert isinstance(result.result, StringSegment)
|
|
# Should be truncated due to string limit or final size limit
|
|
assert len(result.result.value) <= 1000 # Much smaller than original
|
|
|
|
|
|
class TestEdgeCases:
|
|
"""Test edge cases and error conditions."""
|
|
|
|
def test_empty_inputs(self):
|
|
"""Test truncator with empty inputs."""
|
|
truncator = VariableTruncator()
|
|
|
|
# Empty string
|
|
result = truncator.truncate(StringSegment(value=""))
|
|
assert not result.truncated
|
|
assert result.result.value == ""
|
|
|
|
# Empty array
|
|
from factories.variable_factory import build_segment
|
|
|
|
result = truncator.truncate(build_segment([]))
|
|
assert not result.truncated
|
|
assert result.result.value == []
|
|
|
|
# Empty object
|
|
result = truncator.truncate(ObjectSegment(value={}))
|
|
assert not result.truncated
|
|
assert result.result.value == {}
|
|
|
|
def test_zero_and_negative_limits(self):
|
|
"""Test truncator behavior with zero or very small limits."""
|
|
# Zero string limit
|
|
with pytest.raises(ValueError):
|
|
truncator = VariableTruncator(string_length_limit=3)
|
|
|
|
with pytest.raises(ValueError):
|
|
truncator = VariableTruncator(array_element_limit=0)
|
|
|
|
with pytest.raises(ValueError):
|
|
truncator = VariableTruncator(max_size_bytes=0)
|
|
|
|
def test_unicode_and_special_characters(self):
|
|
"""Test truncator with unicode and special characters."""
|
|
truncator = VariableTruncator(string_length_limit=10)
|
|
|
|
# Unicode characters
|
|
unicode_text = "🌍🚀🌍🚀🌍🚀🌍🚀🌍🚀" # Each emoji counts as 1 character
|
|
result = truncator.truncate(StringSegment(value=unicode_text))
|
|
if len(unicode_text) > 10:
|
|
assert result.truncated is True
|
|
|
|
# Special JSON characters
|
|
special_chars = '{"key": "value with \\"quotes\\" and \\n newlines"}'
|
|
result = truncator.truncate(StringSegment(value=special_chars))
|
|
assert isinstance(result.result, StringSegment)
|
|
|
|
|
|
class TestIntegrationScenarios:
|
|
"""Test realistic integration scenarios."""
|
|
|
|
def test_workflow_output_scenario(self):
|
|
"""Test truncation of typical workflow output data."""
|
|
truncator = VariableTruncator()
|
|
|
|
workflow_data = {
|
|
"result": "success",
|
|
"data": {
|
|
"users": [
|
|
{"id": 1, "name": "Alice", "email": "alice@example.com"},
|
|
{"id": 2, "name": "Bob", "email": "bob@example.com"},
|
|
]
|
|
* 3, # Multiply to make it larger
|
|
"metadata": {
|
|
"count": 6,
|
|
"processing_time": "1.23s",
|
|
"details": "x" * 200, # Long string but not too long
|
|
},
|
|
},
|
|
}
|
|
|
|
segment = ObjectSegment(value=workflow_data)
|
|
result = truncator.truncate(segment)
|
|
|
|
assert isinstance(result, TruncationResult)
|
|
assert isinstance(result.result, (ObjectSegment, StringSegment))
|
|
# Should handle complex nested structure appropriately
|
|
|
|
def test_large_text_processing_scenario(self):
|
|
"""Test truncation of large text data."""
|
|
truncator = VariableTruncator(string_length_limit=100)
|
|
|
|
large_text = "This is a very long text document. " * 20 # Make it larger than limit
|
|
|
|
segment = StringSegment(value=large_text)
|
|
result = truncator.truncate(segment)
|
|
|
|
assert isinstance(result, TruncationResult)
|
|
assert result.truncated is True
|
|
assert isinstance(result.result, StringSegment)
|
|
assert len(result.result.value) <= 103 # 100 + "..."
|
|
assert result.result.value.endswith("...")
|
|
|
|
def test_mixed_data_types_scenario(self):
|
|
"""Test truncation with mixed data types in complex structure."""
|
|
truncator = VariableTruncator(string_length_limit=30, array_element_limit=3, max_size_bytes=300)
|
|
|
|
mixed_data = {
|
|
"strings": ["short", "medium length", "very long string " * 3],
|
|
"numbers": [1, 2.5, 999999],
|
|
"booleans": [True, False, True],
|
|
"nested": {
|
|
"more_strings": ["nested string " * 2],
|
|
"more_numbers": list(range(5)),
|
|
"deep": {"level": 3, "content": "deep content " * 3},
|
|
},
|
|
"nulls": [None, None],
|
|
}
|
|
|
|
segment = ObjectSegment(value=mixed_data)
|
|
result = truncator.truncate(segment)
|
|
|
|
assert isinstance(result, TruncationResult)
|
|
# Should handle all data types appropriately
|
|
if result.truncated:
|
|
# Verify the result is smaller or equal than original
|
|
original_size = truncator.calculate_json_size(mixed_data)
|
|
if isinstance(result.result, ObjectSegment):
|
|
result_size = truncator.calculate_json_size(result.result.value)
|
|
assert result_size <= original_size
|